Hunter
Connect Hunter to find and verify professional email addresses, enrich people and companies, and manage your leads and outreach campaigns.
One Hunter API key, generated on the API keys page of your Hunter dashboard, pasted into PopMCP's API key field.
- Setup time
- 2 min
- Auth
- API credentials
- API base URL
- https://api.hunter.io/v2
- Rate limits
- Per endpoint: Domain Search, Email Finder and the Enrichment endpoints allow 15 requests per second and 500 per minute, Email Verifier 10 per second and 300 per minute, Discover 5 per second and 50 per minute. Monthly request volume is set by your plan.
Before you begin
- A Hunter account, including the Free plan with its smaller monthly request allowance
- Sign in as the account whose data PopMCP should see, because the connection is locked to that key's account
- Enough monthly search and verification credits on the plan for the tools you intend to run
Get your credentials
Sign in to Hunter
Sign in at hunter.io with the account that owns the data you want PopMCP to reach.
Open the API keys page
Open hunter.io/api-keys from the account menu. Existing keys are listed with their name, masked value and creation date.
API keys
Retrieve, generate or delete the keys that authenticate your API requests.
| Name | API key | Created | Status |
|---|---|---|---|
| DefaultCreated with your account | a1b2****7f3e | Mar 4, 2026 | Active |
| Sheets add-onGoogle Sheets | 5e77****c410 | Nov 12, 2025 | Active |
Hunter keys carry no scope picker. One key reaches every endpoint your plan includes.
Generate a key named for PopMCP
Click Create a new API key, name it PopMCP, then click Create. Copy the value with the Copy button rather than by selecting the text.
API keys
Retrieve, generate or delete the keys that authenticate your API requests.
A key per integration lets you delete one without breaking the others.
Paste the key into PopMCP
In PopMCP, open the Hunter connector and paste the value into API key. Click Connect.
Connect in PopMCP
Open your workspace, choose Hunter in the marketplace, and fill in the connect dialog:
| Field | What to enter |
|---|---|
| API keysecret | Hunter dashboard (hunter.io) → sign in → account menu → API → copy your API key. Stored encrypted; used server-side only (sent as the api_key parameter). The connection is locked to this key's account.Encrypted with AES-256-GCM on save and never shown again. |
PopMCP verifies the credential against Hunter immediately. On success the connection flips to Verified and its MCP tools are provisioned.
Verify it worked
PopMCP marks the Hunter connector Connected and shows your Hunter account email and remaining monthly credits. A test Domain Search returns email results for the domain you try.
Troubleshooting
401 Unauthorized on every call
Why: The key was mistyped, carries a trailing space, or was deleted from hunter.io/api-keys.
Fix: Re-copy the key from hunter.io/api-keys with the copy button rather than by selecting text, then re-save the PopMCP connection.
Requests succeed but return no emails and no error
Why: Your monthly credits are exhausted, or the domain has no public addresses in Hunter's index.
Fix: Check the remaining credits on your Hunter dashboard, then upgrade the plan or wait for the monthly reset.
429 Too Many Requests
Why: You crossed a per-endpoint rate limit. Discover is the tightest at 5 requests per second.
Fix: Slow the calls down and retry. The limits are per second and per minute, so a short pause clears them.
Data looks like a different company's
Why: The key belongs to a different Hunter account, such as a personal one rather than the team workspace.
Fix: Sign out, sign in as the correct account, generate a fresh key there and reconnect.
Deleting a key broke another tool
Why: Hunter keys are account-wide and often shared across the browser extension, the Sheets add-on and other integrations.
Fix: Keep one named key per integration so you can delete the PopMCP key on its own.